Scope Chain Scope Chain

object.prototype.x = 10; var w = 20;var y = 30; Console.log (x); (function foo () {  var w = ten;  var x = +;  With ({z:50}) {    console.log (w, x, Y, z);//+, ten, +, +  console.log (this.x, THIS.W);//,  cons Ole.log (WINDOW.W); 20}) ();

　　

object.prototype.x = 10; var w = 20;var y = 30; Console.log (x); (function foo () {  var w = ten;  var x = +;  With ({z:50}) {    console.log (THIS.W, this.x, This.y, z);//+, ten, 100,  console.log (x, W);//, 40  Console.log (WINDOW.W);//20}) ();

　　

Search for __parent__ before searching for __proto__.

Closure function

object.prototype.x = 10; var w = 20;var y = 30; Console.log (x); (function foo () {  var w = ten;  var x = +;    (function () {   Console.log (w, x, y);//40,100,30}) ();}) ();

　

Because with will produce a temporary scope during run time, the closure function is within the scope of Foo.

Original: http://www.nowamagic.net/librarys/veda/detail/1645

Scope Chain Scope Chain